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41 products

100ci Big Bore Kit - Black. Fits Twin Cam 1999-2006 - S&S

$3,395.99

Features & Benefits:- * Upgrades Twin Cam 88ci to 100ci. * Cast Ductile Iron Liner; Increases Thermal Conductivity, Aids in Heat dissipation & Improves Ring Seal. * Includes 8.75cc pop up ...

107ci Big Bore Kit - Black. Fits Twin Cam 2007-2017. - S&S

$2,979.99

Features & Benefits:- * Includes 3cc Dome Forged Pistons. * Includes 0.045″ Head Gaskets. * 3.937″ Bore. * 4-3/8″ Stroke. * 10.5:1 Compression Ratio with Stock 85cc Heads. * 10.1:1 Compressio...

110ci Big Bore Kit - Black. Fits Twin Cam 2007-2017 - S&S

$3,395.99

Features & Benefits:- * Upgrades Twin Cam 96ci & 103ci to 110ci. * Cast Ductile Iron Liner; Increases Thermal Conductivity, Aids in Heat dissipation & Improves Ring Seal. * Includes 8....

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110ci Power Pack Kit with 585 Chain Drive Easy Start Camshafts - Black. Fits Big Twin 2007-2017. - S&S

$7,877.99

Features & Benefits:- * 4″ Bore Cylinder and piston kit. (No case machining required.) * S&S 585 Easy Start Chain Drive Cams. * TC3 Oil Pump & TC3 Cam Plate. * S&S cam chain tensio...

117ci Big Bore Kit - Black. Fits Twin Cam 2007-2017 - S&S

$3,862.99

* 117″ Standard Compression – Flat Top Pistons * Note: Crankcases must be bored to accept the larger 4-1/8″ bore cylinders * Compression Ratios: 85cc Stock Heads = 10.9:1 89cc S&S Heads = 10.5...

1200cc Big Bore Kit - Silver. Fits Sportster 1986-2021 with 883cc Engine. - S&S

$2,651.99

Features & Benefits:- * Will Not Fit XR1200 * Includes silver cylinders. * Includes MLS Head Gaskets, Base Gaskets & Exhaust Gaskets. * Includes assembly lube & instructions. * No mac...

1200cc Big Bore Kit - Wrinkle Black. Fits Sportster 1986-2021 with 883cc Engine. - S&S

$2,651.99

Features & Benefits:- * Will Not Fit XR1200 * Includes Black Cylinders. * Includes MLS Head Gaskets, Base Gaskets & Exhaust Gaskets. * Includes Assembly lube & Instructions. * No mach...

124ci Hot Set Up Kit with 91cc S&S Cylinder Heads - Black. Fits Twin Cam 88B Softail 2000-2006. - S&S

$13,351.99

Features & Benefits:- * The S&S 124ci Hot Set Up Kit allows owners of Twin Cam 88 B to upgrade their stock 88ci engines to 124ci using the stock crankcases. * This version of the 124ci Hot...

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1250cc Big Bore Kit - Black. Fits Sportster 1986-2021 - S&S

$2,376.99

Features & Benefits:- * Fits Sportster 1986-2021 including Sportster 2004-2021. * Will Not Fit XR1200 * Includes Black Cylinders. * Includes Flat Top Pistons. * Includes Head Gaskets. * 10.3:1...

128ci Big Bore Kit with Highlighted Fins - Black. Fits Milwaukee-Eight 2017up 114ci Engine. - S&S

$3,699.99

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci to 128ci * 114ci to 128ci Big Bore Kit * 4.250″ Bore * 4.500″ Stroke (4-1/2″) * Forged Pistons. * 11.1 Compression Ratio. * Wrinkle Blac...

129ci Big Bore Kit with Highlighted Fins - Black. Fits Milwaukee-Eight 2017up with 107ci Engine. - S&S

$3,702.99

Features & Benefits:- * Upgrades Milwaukee-Eight 107ci to 129ci. * 4.320″ Bore. * 4.375″ Stroke (4-3/8″). * Forged Pistons. * 11.1 Compression Ratio. * Wrinkle Black Finish. * With Highlighted...

129ci Big Bore Kit with Non-Highlighted Fins - Black. Fits Milwaukee-Eight 2017up with 107ci Engine. - S&S

$3,702.99

132ci Big Bore Kit with Highlighted Fins - Black Granite. Fits CVO Milwaukee-Eight 2017up with 117ci Engine. - S&S

$3,699.99

Features & Benefits:- * Upgrades Milwaukee-Eight 117ci CVO models to 132ci * 4.320″ Bore * 4.500″ Stroke (4-1/2″) * Forged Pistons. * 11.1 Compression Ratio. * Black Granite Finish With Highl...

132ci Big Bore Kit with Non-Highlighted Fins - Black. Fits Milwaukee-Eight 2017up 114ci or 117ci Engine. - S&S

$3,702.99

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci & non-CVO 117ci to 132ci * 4.320″ Bore. * 4.500″ Stroke (4-1/2″). * Forged Pistons. * 11.1 Compression Ratio. * Wrinkle Black Finish...

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136ci Stroker Big Bore Kit with Highlighted Fins - Black. Fits Milwaukee-Eight 2017up with S&S 4-5/8in. Stroker Flywheel. - S&S

$3,883.99

S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight® platform and open up a whole new level of perform...